(A) 2 countries must break their alliances
(B) ** no side can win a decisive victory
(C) a victor is declared
(D) no side is able to launch an attack
EXPLANATIONS BELOW
Concept note-1: -Stalemate has become a widely used metaphor for other situations where there is a conflict or contest between two parties, such as war or political negotiations, and neither side is able to achieve victory, resulting in what is also called an impasse, a deadlock, or a Mexican standoff.
Concept note-2: -The main reason why stalemate is preserved is that it adds strategic flair to the game for both sides. The winning side is left thinking at least in part till the very end to avoid stalemate, and the losing side tries to achieve it, sometimes brilliantly as seen in a few games/puzzles out there.
Concept note-3: -: a drawing position in chess in which a player is not in checkmate but has no legal move to play. : a drawn contest : deadlock. also : the state of being stalemated.
Concept note-4: -Stalemate is a kind of draw that happens when one side has NO legal moves to make. If the king is NOT in check, but no piece can be moved without putting the king in check, then the game will end with a stalemate draw! Here’s an example of the most simple stalemate: If it’s black’s turn to move, the game is over!
Concept note-5: -A stalemate is a situation in which further action by opposing sides seems impossible. In this situation, the game ends as a draw. See an example here: During chess games, if you are in a lost position, stalemates can be used to save the game and get a draw.